A spliced ​​screen and its preparation process

Abstract

The splicing screen and its preparation process disclosed in the present invention relate to the field of display technology. The preparation process includes: obtaining liquid crystal glass and optical modules, positioning light-blocking areas, laying out light-blocking parts, and assembling and arranging protective parts. The process principle is to achieve the anti-light leakage effect of the liquid crystal display unit by setting light-blocking parts and protective parts, avoiding the solution of using shading glue to prevent light leakage in the prior art. The light-blocking part and the protective part have simple structures and do not require additional production equipment and waiting for the curing process. Therefore, the overall splicing screen production process is not excessively increased, and it is also simple to operate during maintenance, fault repair and disassembly.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a spliced ​​screen and a preparation process thereof. Background Art

[0002] The splicing screen is a complete LCD splicing display unit, which can be used as a single display or spliced ​​to form a super large screen. According to different usage requirements, it can realize single-screen split display, single-screen independent display, arbitrary combination display, full-screen LCD splicing, vertical screen display, and the image border can be optionally compensated or covered.

[0003] As far as the current market is concerned, thin and light, ultra-narrow bezels are the mainstream form of the current splicing screen market. In the design of the splicing screen LCD panel, since COF (chip on film) flexible circuit board tails are set on the adjacent sides of the liquid crystal glass, the upper and lower glass substrates sandwiching the liquid crystal glass, the upper glass substrate is smaller than the lower glass substrate, and the specifications are between millimeters, which are used to carry the COF flexible circuit board tail. When the light emitted by the lamp beads on the backplane module of the liquid crystal display unit shines on the part of the lower glass substrate that is not covered by the upper glass substrate and the liquid crystal glass, it will be scattered. The splicing display unit is based on a narrow bezel design, and the bezel edging is not enough to cover and block this part of the reflected light, resulting in the phenomenon of light leakage in the splicing display unit.

[0004] At present, manufacturers of spliced ​​screens mainly use the method of injecting an appropriate amount of shading glue into the cavity formed between the frame edging and the liquid crystal glass to seal the frame to avoid light leakage. However, during the production process, the assembled spliced ​​screen needs to be placed horizontally to allow the glue to solidify, which not only consumes sufficient factory space and production time, increasing production costs, but also requires the purchase of additional glue-spraying equipment, which is expensive. Secondly, this method cannot completely solve the light leakage problem. After the shading glue is solidified, when observing the gap between the frame edging and the screen at a 45° angle from the front of the display unit, a pixel red line can still be seen between the frame and the screen. Summary of the invention

[0005] The purpose of the present invention is to provide a splicing screen and a preparation process thereof. The preparation process of the splicing screen fully solves the technical problem that the current splicing screen with ultra-narrow frame is not sufficient to cover and block the reflected light scattered from the liquid crystal glass because the frame edging is not sufficient to block the reflected light scattered from the liquid crystal glass by setting a positioning light-blocking part on the basis of direct assembly, avoids the use of a light-shielding glue frame sealing solution, does not require additional production equipment, and reduces production costs.

[0006] To achieve the above object, the present invention proposes the following technical solution: a splicing screen preparation process, comprising:

[0007] Obtaining liquid crystal glass and optical modules;

[0008] Positioning the light-blocking area, positioning the light-blocking area on the optical module, the light-blocking area is located at the relative joint position of the optical module and the non-display area on two adjacent sides of the liquid crystal glass; the two adjacent sides are the two sides where the COF flexible circuit board of the liquid crystal glass is installed correspondingly;

[0009] Arrange a light-blocking portion, and set the light-blocking portion in the light-blocking area, and the light-blocking portion at least completely covers the non-display area of ​​the adjacent two side edges;

[0010] Whole assembly, assembling liquid crystal glass, optical module with light-blocking part and frame edging to form a spliced ​​screen semi-finished product;

[0011] The protective part is arranged in the cavity formed between the edge of the upper frame of the spliced ​​screen semi-finished product and the liquid crystal glass, and the protective part fills the cavity to obtain a spliced ​​screen product.

[0012] Furthermore, the liquid crystal glass includes an upper polarizer, an upper glass substrate, a lower glass substrate, a lower polarizer and a COF flexible circuit board which are assembled in sequence from top to bottom, and a liquid crystal encapsulated between the upper glass substrate and the lower glass substrate;

[0013] The COF flexible circuit board forms a COF flexible circuit board tail on two adjacent sides of the liquid crystal glass; the size of the upper glass substrate is smaller than that of the lower glass substrate, and the size difference is in the millimeter level; the size of the liquid crystal is equal to that of the upper glass substrate;

[0014] The size difference between the upper glass substrate and the lower glass substrate constitutes a loading station, and the COF flexible circuit board is loaded on the loading station by tail swinging.

[0015] Furthermore, when the liquid crystal glass is assembled, the polarizer, upper glass substrate, lower glass substrate, lower polarizer and edges of the COF flexible circuit board are aligned on the adjacent two sides of the liquid crystal glass where the COF flexible circuit board is not provided, and the loading station is located on the adjacent two sides where the COF flexible circuit board is provided, and the COF flexible circuit board is loaded on the edge of the lower glass substrate of the loading station.

[0016] Furthermore, the optical module includes a three-layer optical film, a diffuser plate and a module profile assembled in sequence from top to bottom, and the three-layer optical film and the diffuser plate are surface-fitted; the module profile extends upward from the side edge of the diffuser plate to the side end face of the three-layer optical film away from the diffuser plate, forming an extension portion covering the outside of the diffuser plate and the three-layer optical film; the extension portion forms a right-angle installation station at the bottom of the diffuser plate near the side of the diffuser plate, the end of the diffuser plate is adapted to be arranged in the right-angle installation station, and the three-layer optical film rests against the right-angle side of the right-angle installation station.

[0017] Furthermore, the light blocking portion is configured as a light-shielding tape.

[0018] Furthermore, the thickness of the light-blocking portion does not exceed 0.3 mm.

[0019] Furthermore, the protection part is composed of a buffer filler that fills the cavity, and the buffer filler is foam.

[0020] Another object of the present invention is to provide a spliced ​​screen, which is manufactured by the spliced ​​screen manufacturing process mentioned above.

[0021] Another object of the present invention is to provide a display, which adopts the above-mentioned spliced ​​screen.

[0022] It can be seen from the above technical solutions that the technical solutions of the present invention have the following beneficial effects:

[0023] The present invention discloses a splicing screen and a preparation process thereof, which relate to the field of display technology. The preparation process comprises: obtaining liquid crystal glass and an optical module; positioning a light-blocking area on the optical module; setting a light-blocking portion in the light-blocking area; assembling the liquid crystal glass, the optical module with the light-blocking portion and the frame edging to form a semi-finished splicing screen; arranging a protective portion in a cavity formed between the frame edging and the liquid crystal glass on the sample to obtain a splicing screen product; the light-blocking area corresponds to a non-display area of ​​adjacent two sides on the liquid crystal glass, and the adjacent two sides are the two sides on which the COF flexible circuit board of the liquid crystal glass is installed correspondingly, so that after the whole assembly, the light-blocking portion will completely shield the divergent light of the light-blocking area, so that no light will overflow from the liquid crystal glass and be discharged from the gap at the position covered by the frame edging, and the light irradiated by the direct-down light source can be blocked, so as to achieve the technical effect of preventing light leakage of the liquid crystal display unit by setting the light-blocking portion.

[0024] In addition, the protection part can not only achieve buffer protection for the liquid crystal glass, but also further block light; since the light-blocking part is arranged in the light-blocking area, which corresponds to the non-display area of ​​the liquid crystal glass, it will not affect the display area of ​​the liquid crystal glass, and the display area will not be reduced.

[0025] The preparation process of the present invention avoids the solution of using shading glue to prevent light leakage in the prior art. The light blocking part and the protection part have simple structures, and there is no need to add additional production equipment and wait for the curing process. Therefore, the overall splicing screen production process is not excessively increased. At the same time, since there is no glue between the liquid crystal glass and the frame edging and the COF flexible circuit board tail, it is also simple to operate during maintenance, fault repair and disassembly.

[0026] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered to be part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0027] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0029] Figure 1 This is a cross-sectional view of the spliced ​​screen product of the present invention;

[0030] Figure 2 This is an exploded view of the cross section of the spliced ​​screen product of the present invention;

[0031] Figure 3 for Figure 2 Cross-sectional view of section A of the middle splicing screen product.

[0032] In the figure, the specific meaning of each mark is as follows:

[0033] 1-frame edging, 2-COF flexible circuit board tail swing, 3-liquid crystal glass, 3.1-upper polarizer, 3.2-upper glass substrate, 3.3-lower glass substrate, 3.4-lower polarizer, 4-optical module, 4.1-three-layer optical film, 4.2-diffuser plate, 4.3-module profile, 4.4-extension part, 5-light blocking part. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meaning understood by people with general skills in the field to which the present invention belongs.

[0035] The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "a", "an" or "the" and other similar words do not indicate a quantitative limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" cover the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] Based on the existing technology, the main solution to solve the light leakage of spliced ​​screens is to inject an appropriate amount of light-shielding glue into the cavity formed between the frame edging and the liquid crystal glass to seal the frame to avoid light leakage. During production and application, on the one hand, sufficient factory space and production time are required to allow the assembled spliced ​​screen to be placed horizontally until the glue is cured. On the other hand, additional glue-spraying equipment needs to be purchased, which significantly increases the production cost. At the same time, this solution cannot completely solve the light leakage problem. There is a pixel red line between the frame edging and the screen, which affects the viewing experience. The present invention aims to provide a spliced ​​screen and a preparation process thereof. The process directly blocks the light emitted by the optical module to achieve the technical effect of solving the problem of light spilling along the liquid crystal glass, thereby completely solving the light leakage problem of the spliced ​​screen.

[0037] The spliced ​​screen and its manufacturing process disclosed in the present invention are further specifically introduced below in conjunction with the embodiments shown in the accompanying drawings.

[0038] An embodiment of the present invention discloses a preparation process of a spliced ​​screen, including the following five process flows:

[0039] Obtain liquid crystal glass 3 and optical module 4; locate the light-blocking area, locate the light-blocking area on the optical module 4, the light-blocking area is located at the relative joint position of the non-display area of ​​the two adjacent sides of the optical module 4 and the liquid crystal glass 3; the two adjacent sides are the two sides where the COF flexible circuit board tail 2 of the liquid crystal glass 3 is installed correspondingly; arrange the light-blocking part 5, set the light-blocking part 4 in the light-blocking area, the light-blocking part 4 at least completely covers the non-display area of ​​the above-mentioned two adjacent sides; assemble the whole, assemble the liquid crystal glass 3, the optical module 4 with the light-blocking part 5 and the frame edging 5 to form a spliced ​​screen semi-finished product; arrange the protective part, arrange the protective part in the cavity formed between the frame edging 1 and the liquid crystal glass 3 on the spliced ​​screen semi-finished product, the protective part fills the cavity, and obtains a spliced ​​screen product.

[0040] In some embodiments, the liquid crystal glass 3 and the optical module 4 are directly purchased from outside, so the process directly enters the step of positioning the light-blocking area, that is, the light-blocking area is positioned at a corresponding position on the optical module 4 according to the non-display area on the side where the COF flexible circuit board tail 2 is located on the liquid crystal glass 3, and then enters the process of arranging the light-blocking part 5, assembling the whole, and arranging the protection part. In some embodiments, the liquid crystal glass 3 and the optical module 4 are scattered parts and need to be prepared and assembled in advance.

[0041] Combination Figures 1 to 3 As shown, the liquid crystal glass 3 includes an upper polarizer 3.1, an upper glass substrate 3.2, a lower glass substrate 3.3, a lower polarizer 3.4 and a COF flexible circuit board which are assembled in sequence from top to bottom, and a liquid crystal encapsulated between the upper glass substrate 3.2 and the lower glass substrate 3.3; wherein the COF flexible circuit board forms a COF flexible circuit board tail 2 at two adjacent sides of the liquid crystal glass 3; the size specification of the upper glass substrate 3.2 is smaller than the size specification of the lower glass substrate 3.3, and the size difference is in the millimeter level, and the size difference is used to form a loading station for the COF flexible circuit board tail 2; during assembly, the size specification of the liquid crystal is equal to the size specification of the upper glass substrate 3.2.

[0042] When the liquid crystal glass 3 needs to be self-prepared and assembled, the polarizer 3.1, upper glass substrate 3.2, lower glass substrate 3.3, lower polarizer 3.4 and the edge of the COF flexible circuit board on the adjacent two sides where the COF flexible circuit board tail 2 is not provided are aligned, and the loading station is located on the adjacent two sides where the COF flexible circuit board tail 2 is provided, and the COF flexible circuit board tail 2 is loaded on the edge of the lower glass substrate 3.3 of the loading station.

[0043] The optical module 4 includes a three-layer optical film 4.1, a diffuser 4.2 and a module profile 4.3 which are assembled from top to bottom. During the self-assembly, the three-layer optical film 4.1 and the diffuser 4.2 are in contact with each other, and the module profile 4.3 is supported under the diffuser 4.2. Figure 3 As shown, the module profile 4.3 extends upward near the side edge of the diffuser 4.2 to the side end face of the three-layer optical film 4.1 away from the diffuser 4.2, forming an extension 4.4 that covers the outside of the diffuser 4.2 and the three-layer optical film 4.1; the extension 4.4 forms a right-angle installation station at the bottom of the diffuser 4.2 near the side of the diffuser 4.2, and the end of the diffuser 4.2 is adapted to be set in the right-angle installation station, and the three-layer optical film 4.1 is against the right-angle side of the right-angle installation station. In order to ensure the stability of the internal structure of the spliced ​​screen semi-finished product obtained by the whole assembly, the shape of the extension 4.4 near the COF flexible circuit board tail 2 is adapted to the shape of the corresponding position of the COF flexible circuit board tail 2 in the whole assembly state, so that the COF flexible circuit board tail 2 can be closely fitted with CO3 and the optical module 4 during the whole assembly.

[0044] In a specific embodiment, the technical effect achieved by the light-blocking part 5 is to block the light irradiated by the optical module. As the first protective process for preventing light leakage of the spliced ​​screen, the light-blocking part 5 is selected to be composed of an insulating substrate with light-shielding properties, such as a light-shielding sheet, a light-shielding tape, a light-shielding cloth, etc. In the embodiment shown in the accompanying drawings, a light-shielding tape with a certain adhesion effect is selected, and the light-shielding tape is pasted along the adjacent two sides of the optical module 4 close to the liquid crystal glass 3 and corresponding to the COF flexible circuit board tail 2. The width of the light-shielding tape is generally selected to be equal to the width of the non-display area of ​​the liquid crystal glass 3, so it will not affect the display area of ​​the liquid crystal glass 3, and the display area will not be reduced as a result.

[0045] In addition, in the embodiment, in order to avoid excessive gap between the liquid crystal glass 3 and the optical module 4 in the semi-finished splicing screen after assembly, which would affect the display effect, the thickness of the light-blocking part 5 should be selected from a light-shielding material with a smaller thickness without affecting the light-blocking effect. For example, if a light-shielding tape is selected as the light-blocking part 5, its thickness should not exceed 0.3 mm. For example, a light-shielding tape with a thickness of 0.15 mm can be selected.

[0046] In the embodiment shown in the drawings, the frame edging 1 is fixed from bottom to top along the outer side of the COF flexible circuit board tail 2 away from the liquid crystal glass 3 and the optical module 4, and the upper end of the frame edging 1 is provided with a flange extending to the upper side of the liquid crystal glass 3, and the lower surface of the flange is attached to the upper surface of the upper polarizer 3.1. Since the frame edging 1 and the module profile 4.3 in the assembly structure of the spliced ​​screen are usually made of aluminum alloy, after the whole assembly, due to the structural setting of the liquid crystal glass, a cavity will be formed between the frame edging 1 and its flange, and the liquid crystal glass 3. When the frame edging 1 is deformed, it is easy to cause damage to the liquid crystal glass 3. Therefore, the fifth process of the preparation process of the present invention arranges the protection part to solve this problem and achieve the protection of the liquid crystal glass 3. Specifically, the protection part is composed of a buffer filler filling the cavity, and the buffer filler selected in the embodiment is foam; the foam realizes the buffer protection of the liquid crystal glass 3 on the one hand, and further blocks the light as the second protective process to prevent light leakage on the other hand.

[0047] Another embodiment of the present invention is to provide a spliced ​​screen, such as Figure 1 As shown, the spliced ​​screen is made by the above-mentioned spliced ​​screen preparation process, which goes through five process flows: obtaining components, locating light-blocking areas, laying out light-blocking parts, assembling the whole, and laying out protective parts; the spliced ​​screen completely solves the light leakage problem, and after laying out the protective parts, when observing the gap between the frame edging 1 and the screen at 45° from the front of the display unit, there is no pixel red line. Moreover, the manufacturing process directly obtains the spliced ​​screen product after laying out the protective parts, without providing space and time to wait for the glue to be fixed, the production cost increases slightly, and the production efficiency is greatly improved.

[0048] Another embodiment of the present invention is to provide a display, which uses the above-mentioned spliced ​​screen; the display has excellent display performance and good versatility, and no bright light or light spots appear during display.

[0049] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A spliced ​​screen preparation process, characterized in that: Suitable for preparing spliced ​​screens with ultra-narrow borders, including: Obtaining liquid crystal glass and optical modules; Positioning the light-blocking area, positioning the light-blocking area on the optical module, the light-blocking area is located at the relative joint position of the optical module and the non-display area on two adjacent sides of the liquid crystal glass; the two adjacent sides are the two sides where the COF flexible circuit board of the liquid crystal glass is installed correspondingly; Arrange a light-blocking portion, and set the light-blocking portion in the light-blocking area, the light-blocking portion at least completely shields the non-display area of ​​the adjacent two side edges; and the thickness of the light-blocking portion does not exceed 0.3 mm; Whole assembly, assembling liquid crystal glass, optical module with light-blocking part and frame edging to form a spliced ​​screen semi-finished product; Arranging the protection part, arranging the protection part in the cavity formed between the edge of the upper frame of the spliced ​​screen semi-finished product and the liquid crystal glass, and filling the cavity with the protection part to obtain a spliced ​​screen product; the protection part is composed of a buffer filler that fills the cavity; The liquid crystal glass comprises an upper polarizer, an upper glass substrate, a lower glass substrate, a lower polarizer and a COF flexible circuit board which are assembled in sequence from top to bottom, and a liquid crystal encapsulated between the upper glass substrate and the lower glass substrate; wherein the COF flexible circuit board forms a COF flexible circuit board tail at two adjacent sides of the liquid crystal glass; the size specification of the upper glass substrate is smaller than the size specification of the lower glass substrate, and the size difference is in the millimeter level; the size specification of the liquid crystal is equal to the size specification of the upper glass substrate; the size difference between the upper glass substrate and the lower glass substrate constitutes a loading station, and the COF flexible circuit board tail is loaded on the loading station; The optical module includes a three-layer optical film, a diffuser plate and a module profile assembled in sequence from top to bottom, wherein the three-layer optical film and the diffuser plate are surface-bonded; the module profile extends upward from the side edge of the diffuser plate to the side end face of the three-layer optical film away from the diffuser plate, forming an extension portion covering the outside of the diffuser plate and the three-layer optical film.

2. The process for preparing a spliced ​​screen according to claim 1, characterized in that: When the liquid crystal glass is prepared and assembled, the polarizer, upper glass substrate, lower glass substrate, lower polarizer and edges of the COF flexible circuit board are aligned on the adjacent two sides of the liquid crystal glass where the COF flexible circuit board tail is not provided, and the loading station is located on the adjacent two sides where the COF flexible circuit board tail is provided, and the COF flexible circuit board tail is loaded on the edge of the lower glass substrate of the loading station.

3. The process for preparing a spliced ​​screen according to claim 1, characterized in that: The extension portion forms a right-angle installation position at the bottom of the diffuser plate near the diffuser plate side, the diffuser plate end portion is adapted to be arranged in the right-angle installation position, and the three-layer optical film is against the right-angle side of the right-angle installation position.

4. The process for preparing a spliced ​​screen according to claim 1, characterized in that: The light blocking portion is configured as a light shielding tape.

5. The process for preparing a spliced ​​screen according to claim 1, characterized in that: The buffer filler is foam.

6. Splicing screen, characterized in that, The spliced ​​screen is made by the spliced ​​screen preparation process described in any one of claims 1-5.

7. A display, characterized in that The display comprises the spliced ​​screen according to claim 6.

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